Ashraf Yehia El-Naggar

TL;DR: In this article, water and sediment samples from four sites extending for about 20 Km from the beginning of Ismailia canal were collected seasonally for the chemical screening of hydrocarbon pollutants via capillary gas chromatography and collected monthly for the bacterial assessment during the period from August 2007 to July 2008.

TL;DR: In this paper, the geochemical analyses of API gravities, vanadium, nickel, sulfur, and bulk composition were performed on eight samples from productive wells in Gindi, South Deep Abu-gharadig, Abu-GHARADig, Dahab-Merier, and Faghure basins locates in the North Western Desert.

TL;DR: In this article, surface textural characteristics were investigated from nitrogen adsorption-desorption isotherms at −196 °C and the surface modified silica gels were tested as GC solid stationary phases in terms of the separation efficiency for various groups of non-polar and polar solutes.

TL;DR: In this paper, two Bayesian optimization algorithms including Gaussian process regression (GPR) and gradient boosting regression trees (GBRT) are used for tuning the hyper-parameters (number of input and dense nodes, number of dense layers, activation function, batch size, Adam decay, and learning rate) of the deep neural network.

TL;DR: In this article, the parent and thermally treated materials were characterized by means of FTIR, SEM and thermal analysis (DTA and TGA) in order to elucidate the main structural properties.